Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f06f938f74fe3d3…

MALICIOUS

PDF

77.3 KB Created: 2021-04-10 01:05:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e13e79360832ec77186dab4784f209f0 SHA-1: eea880a227b92d5da45efed437d8d4becb891261 SHA-256: 6f06f938f74fe3d33405aa5b4514bfc8191eea8aac7d503e03749c6e6a3f72c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, indicating it functions as a link farm. The presence of 'utm_term' in one URL suggests a phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=symptoms+of+bad+t+con+board+vizio PDF link annotation
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/8346170.pdfIn PDF document text
    • https://kunoloxudiruk.weebly.com/uploads/1/3/4/7/134767428/fe494e0acf1.pdfIn PDF document text
    • https://cdn.sqhk.co/miranilu/YGMZicc/89735038289.pdfIn PDF document text
    • https://sidagavaru.weebly.com/uploads/1/3/2/8/132814791/f3ade9c1ed.pdfIn PDF document text
    • https://wejapunikiver.weebly.com/uploads/1/3/4/2/134266614/bademu.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/YDVC0gg/ganesh_atharvashirsha_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/S63wXa0/19201807514.pdfIn PDF document text
    • https://kudowelevuk.weebly.com/uploads/1/3/4/5/134585456/b9ea5e9fa.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/cy80Pgi/kijavavesofinekesawa.pdfIn PDF document text
    • http://raicen.com/how_to_assign_edpuzzle_in_schoologyld8rc.pdfIn PDF document text
    • https://jasujidavoja.weebly.com/uploads/1/3/4/7/134770870/fibif_libususulikaxok_bejuraduxo_zidad.pdfIn PDF document text
    • https://cdn.sqhk.co/pidagasew/fjbjjB7/80438329914.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/8379303.pdfIn PDF document text
    • http://robot3.site/planeacion_estrategica_empresarialaw85h.pdfIn PDF document text
    • https://loleritukala.weebly.com/uploads/1/3/0/9/130969936/pobajolasutiw.pdfIn PDF document text
    • https://xonalofogikovor.weebly.com/uploads/1/3/4/3/134372302/nalazimusiw.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/make_simple_sentence_on_monstrouswyibz.pdfIn PDF document text
    • https://cdn.sqhk.co/bupusudiva/dvyjegs/minecraft_download_free_download_java_edition_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/jqSSifp/18605507900.pdfIn PDF document text
    • http://osmosiotzs.fun/53364626782uutur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_511aaa1e09ac4d04b4110611491592cb.pdf?index=trueIn PDF document text
    • https://104e0e48-a4c2-4a03-8647-06ef64d4e6ac.filesusr.com/ugd/e2c6c1_756d22ff60d4474c97ddff546ce7451c.pdf?index=trueIn PDF document text
    • https://e60c805d-b9e1-47fc-b045-983511e9ac1f.filesusr.com/ugd/116bb2_922830f95c884f24949c70daba43a6a3.pdf?index=trueIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_128a39871d634e2fbba7dd4c96954ec5.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED57 5724 bytes
SHA-256: 7c809d7b748ef6336d01d400d8cb3dce2c3991f5137c12f9105762ac89e6d93d
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 11460 bytes
SHA-256: bd80ca1c98a3621a212bbed0302f468661a9217662cc6e75c3e03d9241125844